2018-05-28

对MJRefresh.h再次封装，上拉加载更多，下拉刷新

• 在公司称着没事的时间随便写写，自己对MJRefresh再次做了下简单封装，可以满足一般的需求。废话不多说，直接上代码。

• 首先是.h文件

   #import 
   @protocol WCMJRefreshDelegate
   //下拉刷新
  -(void)loadNewTopicWithPageCurrent:(NSInteger)page;
   //上拉加载更多
  -(void)loadMoreTopicWithPageCurrent:(NSInteger)page;
  @end
  
  @interface WCMJRefresh : NSObject
  //下拉刷新闲置状态标题
  @property (nonatomic,copy) NSString *loadNewIdleTitle;
  //下拉刷新正在加载时的标题
  @property (nonatomic,copy) NSString *loadNewRefreshingTitle;
  //上拉加载更多闲置时标题
  @property (nonatomic,copy) NSString *loadMoreIdleTitle;
  //上拉加载更多正在刷新时标题
  @property (nonatomic,copy) NSString *loadMoreRefreshingTitle;
  
  @property (nonatomic,strong) UITableView *tableView;
  @property (nonatomic,weak) id delegate;
  //下拉刷新结束
  - (void)mj_headerEndRefreshing;
  //上拉加载更多结束
  - (void)mj_footerEndRefreshing;
  //数据加载完毕
  - (void)loadFinish;
  //重置当前页
  - (void)ResetCurrentPage;
  @end
  

• .m文件具体实现

  #import "WCMJRefresh.h"
  #import "MJRefresh.h"
  @interface WCMJRefresh()
  @property (nonatomic,strong) MJRefreshGifHeader *header;
  @property (nonatomic,strong) MJRefreshBackNormalFooter *footer;
  //当前页
  @property (nonatomic,assign) NSInteger pageCurr;
  @end
  @implementation WCMJRefresh
  
   - (MJRefreshGifHeader *)header
  {
  if (!_header) {
    _header = [MJRefreshGifHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewTopic)];
    _header.automaticallyChangeAlpha = YES;
    }
    return _header;
   }
  
  - (MJRefreshBackNormalFooter *)footer
  {
    if (!_footer) {
    _footer = [MJRefreshBackNormalFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreTopic)];
     }
     return _footer;
  }
  //重写初始化方法
  - (instancetype)init
  {
    self = [super init];
    if (self) {
    //初始化页码
    _pageCurr = 1;
    
    }
    return self;
  }
  - (void)setTableView:(UITableView *)tableView
  {
   _tableView = tableView;
  
   //下拉刷新
  self.tableView.mj_header = self.header;
  //上拉加载更多
  self.tableView.mj_footer = self.footer;
  }
  //加载新的数据
  - (void)loadNewTopic
  {
  //更新页码
  _pageCurr = 1;
  
   if ([self.delegate respondsToSelector:@selector(loadNewTopicWithPageCurrent:)]) {
    [self.delegate loadNewTopicWithPageCurrent:_pageCurr];
    }
   //置上拉加载更多为闲置状态
   self.footer.state = MJRefreshStateIdle;
  
  }
  //加载更多
  - (void)loadMoreTopic
  {
  _pageCurr ++;
  
   if (self.footer.state != MJRefreshStateIdle) {
    
    if ([self.delegate respondsToSelector:@selector(loadMoreTopicWithPageCurrent:)]) {
        [self.delegate loadMoreTopicWithPageCurrent:_pageCurr];
    }
    }
  
  
    }
  
   //刷新时标题    下拉刷新
   - (void)setLoadNewIdleTitle:(NSString *)loadNewIdleTitle
  {
      _loadNewIdleTitle = loadNewIdleTitle;
      [_header setTitle:self.loadNewIdleTitle forState:MJRefreshStateIdle];
  
  }
  - (void)setLoadNewRefreshingTitle:(NSString *)loadNewRefreshingTitle
  {
      _loadNewRefreshingTitle = loadNewRefreshingTitle;
      [_header setTitle:self.loadNewRefreshingTitle forState:MJRefreshStateRefreshing];
      }
     //上拉加载更多
     - (void)setLoadMoreIdleTitle:(NSString *)loadMoreIdleTitle
     {
         _loadMoreIdleTitle = loadMoreIdleTitle;
         [_footer setTitle:self.loadMoreIdleTitle forState:MJRefreshStateIdle];
  
     }
     -(void)setLoadMoreRefreshingTitle:(NSString *)loadMoreRefreshingTitle
     {
         _loadMoreRefreshingTitle = loadMoreRefreshingTitle;
         [_footer setTitle:self.loadMoreRefreshingTitle forState:MJRefreshStateRefreshing];
     }
  
    //结束头部刷新
    - (void)mj_headerEndRefreshing
    {
        [self.tableView.mj_header endRefreshing];
    }
    //结束尾部刷新
    - (void)mj_footerEndRefreshing
    {
         [self.tableView.mj_footer endRefreshing];
    }
   //数据加载完毕
   - (void)loadFinish
   {
        self.footer.state = MJRefreshStateNoMoreData;
   }
   //重置当前页
   - (void)ResetCurrentPage
  {
       self.pageCurr = 1;
  }
  @end